Eric Sesterhenn, from X41 D-Sec GmbH, discovered severalvulnerabilities in tnef, a tool used to unpack MIME attachments oftype "application/ms-tnef". Multiple heap overflows, type confusionsand out of bound reads and writes could be exploited by tricking auser into opening a malicious attachment. This would result in denialof service via application crash, or potential arbitrary codeexecution.

For the stable distribution (jessie), these problems have been fixed inversion 1.4.9-1+deb8u1.

We recommend that you upgrade your tnef packages.

Further information about Debian Security Advisories, how to applythese updates to your system and frequently asked questions can befound at: https://www.debian.org/security/